CN114269658A - Molded articles made from pulp compositions providing grease and water resistance - Google Patents
Molded articles made from pulp compositions providing grease and water resistance Download PDFInfo
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- CN114269658A CN114269658A CN202080041296.5A CN202080041296A CN114269658A CN 114269658 A CN114269658 A CN 114269658A CN 202080041296 A CN202080041296 A CN 202080041296A CN 114269658 A CN114269658 A CN 114269658A
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- additive composition
- composition
- pulp
- food
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Links
- 239000000203 mixture Substances 0.000 title claims abstract description 87
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 18
- 239000004519 grease Substances 0.000 title claims abstract description 15
- 239000000839 emulsion Substances 0.000 claims abstract description 50
- 235000013305 food Nutrition 0.000 claims abstract description 46
- 239000012169 petroleum derived wax Substances 0.000 claims abstract description 29
- 235000019381 petroleum wax Nutrition 0.000 claims abstract description 29
- 239000008199 coating composition Substances 0.000 claims abstract description 25
- -1 Alkyl Ketene Dimer Chemical compound 0.000 claims abstract description 19
- 150000001875 compounds Chemical class 0.000 claims abstract description 16
- 238000000034 method Methods 0.000 claims abstract description 15
- 238000004519 manufacturing process Methods 0.000 claims abstract description 5
- 239000000654 additive Substances 0.000 claims description 65
- 230000000996 additive effect Effects 0.000 claims description 58
- 239000000835 fiber Substances 0.000 claims description 24
- 240000000111 Saccharum officinarum Species 0.000 claims description 10
- 235000007201 Saccharum officinarum Nutrition 0.000 claims description 10
- 239000007787 solid Substances 0.000 claims description 10
- 230000014759 maintenance of location Effects 0.000 claims description 7
- 239000003795 chemical substances by application Substances 0.000 claims description 5
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 5
- 238000004513 sizing Methods 0.000 claims description 5
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 claims description 5
- 229920002554 vinyl polymer Polymers 0.000 claims description 5
- 229920006317 cationic polymer Polymers 0.000 claims description 4
- 238000009264 composting Methods 0.000 claims description 4
- 239000003086 colorant Substances 0.000 claims description 3
- 239000000975 dye Substances 0.000 claims description 3
- 238000009472 formulation Methods 0.000 claims description 3
- 238000000465 moulding Methods 0.000 claims description 3
- 239000000049 pigment Substances 0.000 claims description 3
- CZMRCDWAGMRECN-UGDNZRGBSA-N Sucrose Chemical compound O[C@H]1[C@H](O)[C@@H](CO)O[C@@]1(CO)O[C@@H]1[C@H](O)[C@@H](O)[C@H](O)[C@@H](CO)O1 CZMRCDWAGMRECN-UGDNZRGBSA-N 0.000 claims description 2
- 229930006000 Sucrose Natural products 0.000 claims description 2
- 238000004537 pulping Methods 0.000 claims description 2
- DMSMPAJRVJJAGA-UHFFFAOYSA-N benzo[d]isothiazol-3-one Chemical compound C1=CC=C2C(=O)NSC2=C1 DMSMPAJRVJJAGA-UHFFFAOYSA-N 0.000 claims 1
- 239000011248 coating agent Substances 0.000 claims 1
- 238000000576 coating method Methods 0.000 claims 1
- SZXQTJUDPRGNJN-UHFFFAOYSA-N dipropylene glycol Chemical compound OCCCOCCCO SZXQTJUDPRGNJN-UHFFFAOYSA-N 0.000 claims 1
- 230000001747 exhibiting effect Effects 0.000 claims 1
- 238000002360 preparation method Methods 0.000 claims 1
- 238000007493 shaping process Methods 0.000 claims 1
- 238000004806 packaging method and process Methods 0.000 abstract description 4
- 239000000126 substance Substances 0.000 description 14
- 239000013055 pulp slurry Substances 0.000 description 4
- 239000001993 wax Substances 0.000 description 4
- 230000006978 adaptation Effects 0.000 description 2
- 125000002091 cationic group Chemical group 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 239000013505 freshwater Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000012188 paraffin wax Substances 0.000 description 2
- 235000019809 paraffin wax Nutrition 0.000 description 2
- 235000019271 petrolatum Nutrition 0.000 description 2
- VUWCWMOCWKCZTA-UHFFFAOYSA-N 1,2-thiazol-4-one Chemical class O=C1CSN=C1 VUWCWMOCWKCZTA-UHFFFAOYSA-N 0.000 description 1
- 241000609240 Ambelania acida Species 0.000 description 1
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 240000003433 Miscanthus floridulus Species 0.000 description 1
- 244000082204 Phyllostachys viridis Species 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- 241000209140 Triticum Species 0.000 description 1
- 235000021307 Triticum Nutrition 0.000 description 1
- 239000010905 bagasse Substances 0.000 description 1
- 239000011425 bamboo Substances 0.000 description 1
- 235000013361 beverage Nutrition 0.000 description 1
- 231100000693 bioaccumulation Toxicity 0.000 description 1
- 239000002361 compost Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 239000005003 food packaging material Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229920002401 polyacrylamide Polymers 0.000 description 1
- 229920001515 polyalkylene glycol Polymers 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000010186 staining Methods 0.000 description 1
- 239000010902 straw Substances 0.000 description 1
Images
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
- D21H11/12—Pulp from non-woody plants or crops, e.g. cotton, flax, straw, bagasse
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
- D21H27/10—Packing paper
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47G—HOUSEHOLD OR TABLE EQUIPMENT
- A47G19/00—Table service
- A47G19/02—Plates, dishes or the like
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D1/00—Containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material, by deep-drawing operations performed on sheet material
- B65D1/34—Trays or like shallow containers
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/03—Non-macromolecular organic compounds
- D21H17/05—Non-macromolecular organic compounds containing elements other than carbon and hydrogen only
- D21H17/17—Ketenes, e.g. ketene dimers
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/60—Waxes
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H19/00—Coated paper; Coating material
- D21H19/10—Coatings without pigments
- D21H19/14—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12
- D21H19/18—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12 comprising waxes
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H19/00—Coated paper; Coating material
- D21H19/10—Coatings without pigments
- D21H19/14—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12
- D21H19/20—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12 comprising macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D21H19/22—Polyalkenes, e.g. polystyrene
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
- D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
- D21H21/16—Sizing or water-repelling agents
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21J—FIBREBOARD; MANUFACTURE OF ARTICLES FROM CELLULOSIC FIBROUS SUSPENSIONS OR FROM PAPIER-MACHE
- D21J1/00—Fibreboard
- D21J1/08—Impregnated or coated fibreboard
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21J—FIBREBOARD; MANUFACTURE OF ARTICLES FROM CELLULOSIC FIBROUS SUSPENSIONS OR FROM PAPIER-MACHE
- D21J3/00—Manufacture of articles by pressing wet fibre pulp, or papier-mâché, between moulds
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W90/00—Enabling technologies or technologies with a potential or indirect contribution to greenhouse gas [GHG] emissions mitigation
- Y02W90/10—Bio-packaging, e.g. packing containers made from renewable resources or bio-plastics
Landscapes
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Paper (AREA)
- Wrappers (AREA)
Abstract
A food safety composition and resulting article of manufacture having grease and water resistance properties comprising a petroleum wax-based aqueous emulsion, a food safety coating formulation, and an Alkyl Ketene Dimer (AKD), wherein the composition exhibits grease and water resistance properties without the presence of fluorinated compounds in the composition. Methods of making the compositions are provided, as well as methods of using the compositions to form pulp molded articles such as food safety containers and other pulp-based food packaging and ware.
Description
Cross Reference to Related Applications
This international application claims priority to U.S. application No. 16/839,340 filed on 3/4/2020, which claims priority to U.S. provisional application No. 62/829,368 filed on 4/2019 at the U.S. patent and trademark office. The disclosure of which is incorporated herein by reference in its entirety.
Technical Field
The present invention relates to a pulp molded article for containing food, and more particularly to such a pulp molded article having oil-resistant and water-resistant properties.
Background
In the food service packaging industry, pulp moldings to be used as food packaging materials are manufactured to safely contain food for consumption in or transport from food service operations. These articles must be safe for food and ideally resistant to grease and water to prevent food from leaking or staining places or items that one does not want to soil. For many years, the food service packaging industry has used FDA approved chemicals to provide that functional tolerance. However, these currently used chemicals are fluorinated compounds.
Despite FDA approval, several non-governmental organizations have recently been investigated by these organizations to raise awareness of concerns about fluorinated compounds and their effects on human health. Furthermore, the biodegradable products association (which is the leading certification authority for compostability) has set a total fluorine limit that will work from 1 month and 1 day of 2020, which is intended to eliminate intentionally added fluorinated compounds. There have been efforts to show that these compounds are bioaccumulating and as such will "pool" in compost applicable to crops, and thus to plants and their fruits. As such, industry desires and needs to identify alternative wet end chemicals that do not use fluorinated compounds but deliver similar grease and water resistant properties.
Disclosure of Invention
The present invention relates to a chemical composition, a manufacturing method, and a pulp molded product for containing food manufactured therefrom, in which a fluorinated compound is not contained.
In one embodiment of the present invention, a pulp molded article is provided. The article comprises natural fiber, Alkyl Ketene Dimer (AKD), a food safe coating formulation, and a petroleum wax-based aqueous emulsion.
In one embodiment of the invention, a pulp molded article comprises at least 95% natural fibers, at least 0.15% Alkyl Ketene Dimer (AKD), at least 0.1% petroleum wax-based aqueous emulsion, and less than 1% vinyl acetate-vinyl alcohol polymer, wherein the article exhibits grease resistance properties and is suitable for use in food contact.
In one embodiment of the invention, an article comprises: 96% to 99.65% natural fibre, 0.15% to 1.1% Alkyl Ketene Dimer (AKD), 0.1% to 1.9% food safe coating formulation and 0.1% to 1% petroleum wax based aqueous emulsion, wherein percentages are weight percentages of the formulation based on dry weight of the article.
In other embodiments of the invention, the article is molded from a pulp composition. The article is formed into a tray, container, tray, bowl, vessel, lid or cup. The articles are compostable in industrial composting facilities. The article has a thickness of less than 2 millimeters. The article has a thickness of at least 0.5 millimeters.
In one embodiment of the present invention, an additive composition is provided. The additive composition comprises a food safe coating formulation, a petroleum wax based aqueous emulsion, and an Alkyl Ketene Dimer (AKD).
In one embodiment of the invention, the additive composition comprises a petroleum wax-based aqueous emulsion and an Alkyl Ketene Dimer (AKD).
In one embodiment of the present invention, a pulp-based composition is provided. The pulp-based composition comprises 0.1 to 10 weight percent of a petroleum wax-based aqueous emulsion, 0.1 to 10 weight percent of a food safe coating formulation, 0 to 0.5 weight percent of a cationic polymer, 0.1 to 10 weight percent of an alkyl ketene dimer, and 69.5 to 99.7 weight percent of pulp, wherein weight percent is based on the total weight of the pulp-based composition.
Further areas of applicability of the present invention will become apparent from the detailed description provided hereinafter. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.
Drawings
The present invention will become more fully understood from the detailed description and the accompanying drawings. The drawings are not necessarily to scale, wherein:
FIG. 1 is a process flow diagram illustrating one embodiment of the present invention.
Detailed Description
The following description of the embodiments of the invention is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses. The following description is provided for the purpose of providing an enabling disclosure of the invention, by way of example only, and not for the purpose of limiting the scope or spirit of the invention.
In one embodiment of the present invention, an additive composition having oil and grease resistance and water resistance without using a fluorinated compound is provided. The additive composition is used in the wet end of a paper pulping machine or process. The term "wet end" is a generic term for the portion of a papermaking machine or process that involves a slurry of fibers, fillers, or other additives. The "dry end" of a paper machine is typically where the paper roll is formed. The rough boundary between the wet and dry sections is typically drawn at the wet press section, which is the final location where water is extracted from the wet paper web. One exception to this rule is the size press, as the size press treatment can be closely linked to what happens in the wet end. The beginning of the wet end is generally considered to be at the main refiner system because most papermaking chemicals are added after this point.
In accordance with one embodiment of the present invention, the additive composition comprises, consists essentially of, or consists of a food safe coating formulation, a petroleum wax-based aqueous emulsion, and an Alkyl Ketene Dimer (AKD). This additive composition is referred to herein and in fig. 1 as "additive composition 1".
Preferably, additive composition 1 is an emulsion of: 40 to 50 weight percent of a food safe coating formulation, 20 to 30 weight percent of a petroleum wax-based aqueous emulsion, and 25 to 35 weight percent of AKD, wherein weight percents are based on the total weight of the additive composition; and producing a final emulsion of 20 to 30 wt% total active solids, 8 to 12 wt% of the total active solids being the food safe coating formulation, 8 to 12 wt% being the wax emulsion, and 4 to 6 wt% being AKD. These chemicals are emulsified for a period of time to ensure that the emulsion remains suspended.
In accordance with another embodiment of the present invention, the additive composition comprises, consists essentially of, or consists of a petroleum wax-based aqueous emulsion and an Alkyl Ketene Dimer (AKD). This additive composition is referred to herein and in fig. 1 as "additive composition 2".
Preferably, additive composition 2 is an emulsion of 55 to 65 weight percent petroleum wax-based aqueous emulsion and 35 to 45 weight percent AKD, where weight percentages are based on the total weight of the additive composition, and results in a final emulsion of 15 to 30 weight percent total active solids, of which 10 to 15 weight percent are wax emulsions and 8 to 12 weight percent are AKD. These chemicals are emulsified for a period of time to ensure that the emulsion remains suspended.
The additive composition of the present invention exhibits grease and water resistance properties, and no fluorinated compound is present in the additive composition.
Examples of petroleum wax-based aqueous emulsions suitable for use in the composition are cationic emulsions of paraffin waxes, more particularly fully refined paraffin waxes. Commercial suppliers of petroleum wax-based aqueous emulsions include, but are not limited to, WE20 from Walker Industries, HY708 from Michelman, Inc.
An example of a food safe coating formulation is a coating formulation comprising a vinyl acetate-vinyl alcohol polymer. Preferably, the coating formulation has a composition selected from the group consisting of: vinyl acetate-vinyl alcohol polymers, isothiazolinones, polyalkylene glycols, and combinations thereof. Examples of commercially available food safe coating formulations and suppliers include, but are not limited to, MC525 by Michelman, Inc.
Retention aids are used to retain small fibers (fines), fillers and other small particles on the finished sheet in the papermaking system, as well as to help draw more water during the forming process to reduce the dewatering load on the dry end of the papermaking machine or system. Examples of retention aids are cationic polymers, more preferably cationic polyacrylamides. Commercial retention aids and their suppliers include, but are not limited to, Bufloc 5321 by Buckman Laboratories International, Inc., Solenis International LLC, and the like.
An example of a sizing agent suitable for use in the composition is Alkyl Ketene Dimer (AKD). Commercial suppliers of sizing agents include, but are not limited to, Ares Chemical, Kemira Chemicals, and the like.
Other additives may be present in the composition or may be added during the process. Examples of other additives include, but are not limited to: retention aids, sizing agents, pigments, dyes, other colorants, and combinations thereof.
Referring to the drawings, FIG. 1 illustrates one embodiment of a process according to the present invention. Pulp slurry (e.g., about 3% dry weight pulp and 97% water) enters a dense bleached pulp tank 50 ("tank 1"). Dense pulp is added to the mixing tank 60 from the pulp tank 50. Examples of types of pulp for use in the present invention include, but are not limited to, sugar cane fiber, bagasse, bamboo, wheat straw, and miscanthus.
The additive 1 is petroleum wax-based aqueous emulsion. Simultaneously with the dense pulp addition, additive 1 from tank 10 is added to mixing tank 60. After the first two addition steps are completed, the mixer in the mixing tank 60 is turned on for a period of time, such as a few minutes.
The additive 3 is a retention aid. Additive 3 in tank 40 is added simultaneously with the fresh water addition. The mixing tank 60 is mixed after adding fresh water and additive 3. After mixing, the finished mixed pulp is pumped from the mixing tank 60 to the forming tank 70.
The plates can be maintained at a top and bottom temperature of 110 ℃.
In an alternative method, additives 1,2 and 4 are blended together as additive composition 1 in tank 5 and then added to the pulp slurry in the tank, or added directly to the pipe before any other additives and combined after addition to the tank.
In another alternative method, additives 1 and 4 are blended together as additive composition 2 in tank 5 and then added to the pulp slurry in the tank, or added directly to the pipe before any other additives and combined after addition to the tank.
In one embodiment of the present invention, a pulp-based composition is provided. The pulp-based composition comprises: 0.1 to 10 wt% of a petroleum wax-based aqueous emulsion, 0.1 to 10 wt% of a food safe coating formulation, 0 to 0.5 wt% of a cationic polymer, 0.1 to 10 wt% of an alkyl ketene dimer, and 69.5 to 99.7 wt% of a pulp, wherein the weight percentages are based on the total weight of the pulp-based composition.
The resulting pulp-based composition can then be shaped or molded into a pulp molded product that is safe for use in contacting or containing food (also referred to as "food safe"). "food safe" generally refers to safe for contact with food for human consumption.
One of the advantages of the compositions of the present invention is that the chemical compositions do not use fluorinated compounds to achieve acceptable oil and grease resistance and water resistance. The fluoride-free chemical composition of the present invention achieves grease resistance acceptable for most food applications in food service without safety risks.
Examples of pulp moldings for holding food or beverages include, but are not limited to, trays, containers, clam shells, lids, cups, trays, bowls, utensils such as serving or eating utensils, or combinations thereof.
In addition, the elimination of fluorinated compounds in the packaging reduces the source of these compounds in composting operations, which will reduce the risk of human contact.
In one embodiment of the present invention, there is provided a food safety article comprising: natural fibers, Alkyl Ketene Dimer (AKD), food safe coating formulations, and petroleum wax based aqueous emulsions. The article does not comprise a fluorinated compound.
Preferably, the natural fiber is sugar cane fiber. The sugar cane fibers may be bleached/white sugar cane fibers or unbleached sugar cane fibers. It is contemplated that other natural fibers may be used in accordance with the present invention.
In another embodiment of the present invention, the article comprises: 96 to 99.65 wt% of natural fibers, 0.15 to 1.1 wt% of Alkyl Ketene Dimer (AKD), 0.1 to 1.9 wt% of a food safe coating formulation, and 0.1 to 1 wt% of a petroleum wax based aqueous emulsion, wherein the percentages are weight percentages of the formulation based on the dry weight of the article. The article is a food safety article molded from a pulp composition. The article exhibits grease and water resistance properties.
The articles may be of various shapes and sizes. Preferably, the article has a thickness of less than 2 mm. Preferably, the article has a thickness of at least 0.5 mm.
One feature of the invention is that the article is compostable in an industrial composting facility.
Those skilled in the art will readily appreciate that the present invention is susceptible to a wide range of utilities and applications. Many embodiments and adaptations of the present invention other than those herein described, as well as many variations, modifications, and equivalent arrangements, will be apparent from or reasonably suggested by the present invention and the foregoing description thereof, without departing from the substance or scope of the present invention. Thus, while the present invention has been described herein in detail with respect to the preferred embodiments thereof, it is to be understood that this disclosure is only illustrative and exemplary of the present invention and is made merely for the purpose of providing a full and enabling disclosure of the invention. The foregoing disclosure is not intended or should be construed to limit the present invention or otherwise to exclude any such other embodiments, adaptations, variations, modifications and equivalent arrangements.
Claims (39)
1. An article, comprising:
the natural fiber is a natural fiber, and the natural fiber,
an Alkyl Ketene Dimer (AKD),
food-safe coating preparation, and
petroleum wax based aqueous emulsions.
2. The article of claim 1, wherein the article is molded, shaped, or both.
3. The article of claim 1, wherein the article does not comprise a fluorinated compound.
4. The article of claim 1, wherein the article is food safe.
5. The article of claim 1, wherein the natural fiber is sugar cane fiber.
6. The article of manufacture of claim 5, wherein the sugar cane fibers are bleached or white sugar cane fibers.
7. The article of manufacture of claim 5, wherein the sugar cane fibers are unbleached sugar cane fibers.
8. The article of claim 1, wherein the food-safe coating formulation comprises a component selected from the group consisting of: vinyl acetate-vinyl alcohol polymers; 1, 2-benzisothiazolin-3-one; dipropylene glycol; and combinations thereof.
9. An article, comprising:
at least 95% of the natural fibres are,
at least 0.15% of Alkyl Ketene Dimer (AKD),
at least 0.1% of a petroleum wax-based aqueous emulsion,
and less than 1% of a vinyl acetate-vinyl alcohol polymer,
wherein the article exhibits grease resistance and is suitable for food contact.
10. The article of claim 9, wherein the article is molded from a pulp composition.
11. The article of claim 9, wherein the article is shaped as one of a tray, container, lid, cup, tray, bowl, and vessel.
12. The article of claim 9, wherein the article is compostable in an industrial composting facility.
13. The article of claim 9, wherein the article has a thickness of less than 2 millimeters.
14. The article of claim 9, wherein the article has a thickness of at least 0.5 millimeters.
15. An article, comprising:
96% to 99.65% of natural fibres,
0.15% to 1.1% of Alkyl Ketene Dimer (AKD),
from 0.1% to 1.9% of a food safe coating formulation, and
0.1 to 1 percent of petroleum wax-based aqueous emulsion,
wherein percentages are weight percentages of the formulation based on the dry weight of the article.
16. The article of claim 15, wherein the article is a food safety article molded from a pulp composition, the article exhibiting grease and water resistance properties.
17. The article of claim 15, wherein the pulp composition is characterized by the absence of fluorinated compounds.
18. The article of claim 15, wherein the article is shaped as one of a tray, container, lid, cup, tray, bowl, and vessel.
19. The article of claim 15, wherein the article has a thickness of less than 2 millimeters.
20. The article of claim 15, wherein the article has a thickness of at least 0.5 millimeters.
21. An additive composition, comprising:
a coating formulation for food safety is provided,
petroleum wax-based aqueous emulsion, and
alkyl Ketene Dimer (AKD).
22. The additive composition of claim 21, wherein the additive composition further comprises a component selected from the group consisting of: retention aids, sizing agents, pigments, dyes, other colorants, and combinations thereof.
23. The additive composition of claim 21, wherein the food safe coating formulation is present in an amount of 35 wt.% to 55 wt.%, based on the total weight of the additive composition.
24. The additive composition of claim 21, wherein the petroleum wax-based aqueous emulsion is present in an amount of 15 wt% to 35 wt%, based on the total weight of the additive composition.
25. The additive composition of claim 21, wherein the AKD is present in an amount of 20 wt.% to 40 wt.%, based on the total weight of the additive composition.
26. The additive composition of claim 21, wherein the additive composition is in the form of an emulsion.
27. The additive composition of claim 26, wherein the emulsion comprises 15% to 35% by weight total active solids.
28. The additive composition of claim 27, wherein the total active solids comprise from 1 to 20 wt% of the food safe coating formulation, from 1 to 20 wt% of the petroleum wax-based aqueous emulsion, and from 1 to 10 wt% of AKD.
29. The additive composition of claim 21, wherein the composition exhibits grease and water resistance properties, and the fluorinated compound is absent from the additive composition.
30. An additive composition, comprising:
petroleum wax-based aqueous emulsion, and
alkyl Ketene Dimer (AKD).
31. The additive composition of claim 30, wherein the additive composition further comprises a component selected from the group consisting of: retention aids, sizing agents, pigments, dyes, other colorants, food safe coating formulations, and combinations thereof.
32. The additive composition of claim 30, wherein the petroleum wax-based aqueous emulsion is present in an amount of 50 wt% to 70 wt%, based on the total weight of the additive composition.
33. The additive composition of claim 30, wherein the AKD is present in an amount of 30 wt.% to 50 wt.%, based on the total weight of the additive composition.
34. The additive composition of claim 30, wherein the additive composition is in the form of an emulsion.
35. The additive composition of claim 34, wherein the emulsion comprises 10 to 35 wt% total active solids.
36. The additive composition of claim 35, wherein the total active solids comprise from 5 to 20 wt% petroleum wax-based aqueous emulsion and from 1 to 20 wt% AKD.
37. A pulp-based composition, the pulp-based composition comprising:
0.1 to 10% by weight of an aqueous petroleum wax-based emulsion,
0.1 to 10% by weight of a food safe coating formulation,
0 to 0.5% by weight of a cationic polymer,
0.1 to 10% by weight of an alkyl ketene dimer, and
69.5 to 99.7% by weight of pulp,
wherein weight percents are based on the total weight of the pulp-based composition.
38. A method of making a pulp-based composition, the method comprising adding the pulp-based composition of claim 37 to the wet end of a paper pulping machine or process.
39. A method of using a pulp-based composition, the method comprising shaping or molding the pulp-based composition of claim 37 into a food-safe shaped article.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311301200.6A CN117468267A (en) | 2019-04-04 | 2020-04-03 | Molded articles made from pulp compositions providing grease and water resistance |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US201962829368P | 2019-04-04 | 2019-04-04 | |
| US62/829,368 | 2019-04-04 | ||
| PCT/US2020/026602 WO2020206271A1 (en) | 2019-04-04 | 2020-04-03 | Molded article made by a pulp composition providing grease and water-resistant properties |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202311301200.6A Division CN117468267A (en) | 2019-04-04 | 2020-04-03 | Molded articles made from pulp compositions providing grease and water resistance |
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| CN114269658A true CN114269658A (en) | 2022-04-01 |
| CN114269658B CN114269658B (en) | 2023-10-20 |
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| CN202311301200.6A Pending CN117468267A (en) | 2019-04-04 | 2020-04-03 | Molded articles made from pulp compositions providing grease and water resistance |
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| CN202311301200.6A Pending CN117468267A (en) | 2019-04-04 | 2020-04-03 | Molded articles made from pulp compositions providing grease and water resistance |
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| US (3) | US11718960B2 (en) |
| EP (1) | EP3947191A4 (en) |
| CN (2) | CN114269658B (en) |
| AU (1) | AU2020254763A1 (en) |
| BR (1) | BR112021019594A2 (en) |
| CA (1) | CA3132184A1 (en) |
| CO (1) | CO2021014401A2 (en) |
| MX (1) | MX2021012088A (en) |
| WO (1) | WO2020206271A1 (en) |
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Also Published As
| Publication number | Publication date |
|---|---|
| CA3132184A1 (en) | 2020-10-08 |
| WO2020206271A1 (en) | 2020-10-08 |
| US20200318288A1 (en) | 2020-10-08 |
| US20230332354A1 (en) | 2023-10-19 |
| US20230332355A1 (en) | 2023-10-19 |
| CO2021014401A2 (en) | 2021-12-10 |
| CN114269658B (en) | 2023-10-20 |
| BR112021019594A2 (en) | 2021-11-30 |
| MX2021012088A (en) | 2022-01-04 |
| US11718960B2 (en) | 2023-08-08 |
| AU2020254763A1 (en) | 2021-10-28 |
| EP3947191A1 (en) | 2022-02-09 |
| CN117468267A (en) | 2024-01-30 |
| EP3947191A4 (en) | 2023-01-04 |
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